/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package servlets;

import dataIO.mySQLIO;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URI;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import sun.net.util.URLUtil;

/**
 *
 * @author Christian
 */
public class pictureGenerator extends HttpServlet {
    private final int IMG_PER_PAGE = 5;
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        String pictures = "";
        try {
            HashMap<String,String> param = extract(request.getQueryString());
            String type = param.get("type");
            String material = param.get("material");
            ArrayList<String> list = mySQLIO.getPictures(type, material);
            int count = 0;
            pictures+= "<div class='scrollable'> <div class='items'>"
                + "<div>";
            for(String pic : list) {
                if(count % IMG_PER_PAGE == 0)
                    pictures+="</div> <div>";
                pictures+="<img src='" + pic + "'/>";
            }
            pictures+="</div> </div> </div>";
        } catch(Exception e) {
                e.printStackTrace();
        } finally {
            out.write(pictures);
            out.close();
        }
    }
    
    private HashMap<String, String> extract(String parameters) {
        HashMap<String,String> list = new HashMap<String,String>();
        String[] sets = parameters.split("[?&=]");
        System.out.println(Arrays.deepToString(sets));
        try{
            for(int i = 0; i < sets.length; i+=2)
                list.put(URLDecoder.decode(sets[i], "UTF-8"), URLDecoder.decode(sets[i+1], "UTF-8"));
        } catch(Exception e) {
            e.printStackTrace();
        }
        return list;
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
